Peter j



P. J. HOLNSGHEID.

(No Model.)

, SELF oILING DRILL.

Patented Apr. 13, 1897.

TAMS

PETER J. IIOENSCHEID, OF AKRON, OHIO, ASSIGNOR TO THE VIIITMAN 82s BARNES MANUFACTURING COMPANY, OF SAME PLACE.

ssLF-olLlNe DRILL.

SECIFICATION forming part of Letters Patent No. 580,398, dated April 13, 1897.

Application filed October '7, 1896.

T all whom, it may concern:

Be it known that I, PETER J. I-IonNsoHnID, a citizen of the United States, residing in the city of Akron, county of Summit, and State of Ohio, have invented a certain new and useful Improvement in Self-Oiling Drills, of which the following is a full, clear, and exact description, reference being had to the accom panying drawings. 1o My invention relates to self-oiling drills; and its object is to provide a drill having an oil-conduit leading to the working point, with economical and convenient means of supplying oil to that conduit.

My invention also contemplates providing such means as will supply oil to a revolving drill held in horizontal position.

The invention consists in the combination, with suoli a drill, of a collar surrounding the zo drill-shank and held thereto against longitudinal movement and supplying oil to the drill from a tube held in proper relation to the drill by the collar.

Another part of the invention consists of the combination of tubular holes and grooves by which the oil is conveyed to the Working point.

The drawings show my invention embodied in the best form at present known to me.

Figure l is an elevation of a complete drill containing the invention. Fig 2 is a transverse section on the line 2 2, and Fig. 3 a bottom view thereof, both being on an enlarged scale. Fig. a is a view of the ldrillshank, being taken at right angles to Fig. l and its lower portion being a section on the line 4 4; of Fig. l.

A is a twist-drill having a shank B, which may be cylindrical or tapered or formed inv 4o other suitable manner. Carried by the body of the drill is the oil-conduit, which I form by making a groove c therein and covering the outside of the same in any suitable manner by a strip of metal d, preferably brass. The grooves c (preferably two in number) terminate in the diagonal tubular holes @shown in Fig. 4. These holes continue the conduit from the surface grooves to the transverse hole f, extending through the drill and com- 5o municating at each end with the annular Serial No. 608,140. (No model.)

groove g. They are conveniently and economically made and furnish a direct path to the covered surface grooves. Thus oil supplied to this annular groove will ow through the holes f and e and the grooves cand'reach the working point of the drill.

Oil is delivered to the annular groove g from a stationary supply by means of the tube p and the collar z', the inner end of the tube being held in proper juxtaposition to the annular groove by the collar, while the collar, having its inner wall in apposition to the annular groove, makes a passage around the shank and thus supplies oil coming through the tube continuously to the conduit. Dislocation of the collar is prevented by a set-screw 7o, whose end terminates in the annular groove. A shoulder s is preferably formed upon the drill-shank ou which the collar may rest, whereby any leakage resulting from looseness of the collar is prevented or minimized. It will be seen that if the collar is made to fit snugly about the shank oil may be fed to the drill-point when the drill is working in a horizontal position or even if it should be completely inverted.

Having thus described my invention, what I claim isl. A drill having an oil-conduit leading from its point to its shank and terminating at the shank in an annular groove, in combination with a collar surrounding the shank and having a set-screw projecting into said groove anda tube supplying oil to said groove and held in proper relation thereto by said collar, for the purpose speciied.

2. A drill having an annular groove about its shank, a diametrical hole through it terminating at eac-h end in the annular groove, and a diagonal hole whose entrance is within the said diametrical hole and whose exit is into a covered channel beginning at a point on the shank below the annular groove and eX- tending to or near to the working point of the drill, substantially as described.

PETER J. I-IOENSCIIEID.

Witnesses:

W. H. WRIGHT, LA. VINING. 

